Comment 3 for bug 1554380

Mark, This patch is required to arrest the service unavailabilty error. and I am assming that there is an bug in heat side that is if translation is provided between required and optional properties, which is initialized with input parameter in the template and if that input parameter is not given, this kind errors occur, especially it happens in Neutron Port [1] and FloatingIps [2].

[1] https://github.com/openstack/heat/blob/master/heat/engine/resources/openstack/neutron/port.py#L348
[2] https://github.com/openstack/heat/blob/master/heat/engine/resources/openstack/neutron/floatingip.py#L142

But even after these issue fixed, still there are circular reference, which needs to be fxied on heat-template repo.